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Spin Transport from Ags to Rhic Wtih Two Partial Snakes in Ags
A. U. LUCCIO
W. W. MACKAY
N. TSOUPAS
J. TAKANO
出版
Brookhaven National Laboratory
, 2006
URL
http://books.google.com.hk/books?id=n4GDAQAACAAJ&hl=&source=gbs_api
註釋
The stable spin direction in the RHIC rings is vertical. With one or two partial helical Siberian snakes in the AGS, the stable spin direction at extraction is not vertical. Interleaved vertical and horizontal bends in the transport line between AGS and the RHIC rings also tend to tip the spin away from the vertical. In order to maximize polarization in RHIC, we examined several options to improve the matching of the stable spin direction during beam transfer from the AGS to each of the RHIC rings. While the matching is not perfect, the most economical method appears to be a lowering of the injection energy by one unit of G{gamma} from 46.5 to 45.5.
